Tire-valve.



M. C. SCHWEINERT & H. P. KRAFT.

TIRE. VALVE. Y APPLICATION FILED MAY Z6. 1906.

Patented J an. 14, 19.13.

INVENTORS 'v P M,

WITNESSES;

UNITED sTATEs PATENT oEEieE.

IAXIMIILIAN CHARLES SCHWEINERT, F WEST HCl-BOXEN, NEW JERSEY, AND HENRY I nEns soN, mconroanrnn, (INCORPORATED 1N 190e.)

Specification of Letters Patent. Application filed May 2.6, 1906. Serial No. 318,902.

Tran-VALVE.

Patented J an. 14, 1913.

To all 'whom t may concern:

Be it j known that we, MAXIMILIAN CHARLES SCHWEINERT, residing at West Hoboken, in the county of Hudson and State of New Jersey, and HENRY P. KRAFT, residing in the borough of Brooklyn, county of Kings, city and State of N ew` York, citizens of the United States, have jointly invented certain new and useful Improvements 'in Tire-Valves, of which the following is a specication.

In tire valves of the usual Schrader and similar types, the valve seats against what we may call a seat member, and thls seat member is removable from within the casmg. e presentinvention provides an lmproved device for-securing a tight joint parts in elevation; Figs. 2

between the seat member and the casing, so that no air shall leak around the seat member. For this purpose we provide a packing which is arranged to be expanded laterally, preferably by the axial pressure which is used in inserting-the seat member to its position within the casin Various advantages are referred to in detail hereinafter. ,o

The accom anying drawings illustrate embodiments o the invention.

Figure 1 is a diametral section through the casing of a valve showing the internal and 3 illustrate cn a larger scale the action of the packing, being diametral sections through the seat member in diierent positions of the latter; Figs. 4 and 5 are diametral sections of other forms of the invention.

Referring to the embodiments of the invention illustrated, the seat member A has its lower end formed into a valve seat for engagement by the valve B. The seat memis forced into place or withdrawn by means of a threaded plug C, which is swiveled to the seat member, as indicated in the sectional views. In many previous valves of this type the movement of the seat member into the casing served to bring a packing ring on the seat member against a wall of the casing to efect the required tight joint, the packing ring being pressed inward or upward by its engagement with the wall of the casing. According to the Ypresent invention the seat tion in the casing, and the packing is then expanded to lill the space around a certain line between the seat member and the casing.. Preferably this expansion is effected by a ther axial movement of the plug after the seat member has found its position in the casing. An important feature of the invention is that the packing is expanded without being subjected to any material torsional action, so that it is 'not distorted thereby. he packing ring is arranged between a suitable shoulder of the seat member and a lower face of the plug, and is made of very yielding and elastic material, such as good rubber, so as to permitof the desired lateral expansion under axialpressure. In the construction illustrated for example, the casing isvprovided with a shoulder D of suitable diameter to engage the tapered under face of the seat member A, and to stop the latter at the desired height in the casing. Surrounding the seat member A and resting upon a shoulder E thereof, is a ring F of rubber or thelike, which may be of circular section as shown, or of any other convenient Section. After the Seat member A has found its position against the shoulder D of the casing, the further downward movement of the plug C brings a pressure against the upper edge of the packing ring F, and

member is brought to its posispreads the latter 1n the manner indicated in Fig. 3, so that it presses hard at all points against the casing around a line G, and makes an air-tight closure around this line. In previous constructions in which the seat member was moved down until its packing ring pressed suliiciently hard upon the shoulder of the casing to prevent further movement of the seat member, and at the same time to make a tight joint between the seat member and the casing, the packing was often damaged in the irst introduction of the seat` member into the casing. Furthermore the packing often by being pressed too hard against the casing, stuck to the latter when the seat member was withdrawn, thus ripping 02H the packing and requiring renewal. In the present case the W1 etten..

t plug and tbe packing ring'9 this anti-friction rino; being oit metal and preferably circular in oroesseetiom lllow when' the plug is rotated, it will move freely over the upper odge oi the antiiriction ring lvl. while the latter will remain stationary against 'the pao-hing ring F. lt will be noted that as the seat member is pressed inwardly it has no subetantial rotary motion. '.lhis is important since as the packing ring is oompreseed its inner eide preaees against member, and it the latter were,y rota ed as it was pressed inwardly it would 'tend to produce a certain degree oi torsional dieten tion in tbe packing.

The principle may be embodied 1n a great number oit variations ot" which We have shown only a few. For example in Fig. d the loose ring .l #comes to a stop against the shoulder D oi the easing, while the movement of the remaining portions oi the seat member and plug squeezes the packing ring l? between the ring J and a shoulder K above. A similar eonstruotion is shown in Fig. 5, a ring L being arranged to engage the shoulder D of the casing, and to squeeze the packing ring F in the same manner as in Fig. 4:; the ring l. however being clamped about an inner extension M of the packing ring so as to prevent the latter in any oase from being drawn over the end of the seat member when the latter is Withdrawn trom the casing. The shouldered portion il oi the seat member in this construction, as Well as in that in Fig. Il, serves also as an antifrietion ring between the packing ring and the plug This invention also includes a novel method or" connecting the seat member to the plug, aocording to which the plug is formed with a flange O which is turned inwardly over a liange P formed on the seat member. Preferably, the plug is 'formed with a deep socket Q, which permite considerable movement of the Harige of the seat member` therein,` so that a great relative movement 0i the plug and seat member is provided for compressing the packing.

Though We have described with great particularity of detail certain specio embodimente of our invention, yet it is not to be understood therefrom that the invention is limited to the particular embodiments disclosed. Various modioations thereof in detail, and in the arrangement and combi nation oit' the parts, may' be made by those the seatV skilled in the art7 Without departure iron), the invention.

What We claim is i. ln a valve lor tires or the like, in oombinationa a casing, a seat-member, fitting within said casing, a packing surroundin said seat-member and hitting Within said easing' with said seat member and means also fitting Within the casing and adapted to expand said packing laterally until its expanded edge is compressed against the inner vvall ot said casing and maires a tight joint therewith, said means operating without exposing said packing to anysubstantial rotary distortion.

2. ln a valve for tires or the lilie9 in combination, a casing, a seat member adapted to tit Within said oasin 7 a screw-threaded pluf svviveled thereto an extending Within said casing, a packing ring surrounding said seat member in said casing, and an anti-friction member also surrounding said seat member, said pluor being adapted to compress said packing between said anti-friction member and saidl seat member to expand said aoking laterally against the inner Wall o said casing.

3. ln a tire-valve or the like, in combination, a casing, a seat member fitting Within said casing.` a screw-threaded member movable independently of said seatmember and extending Within said casing and leaving a deep socket, and an inwardly turned dange, and said seat member extending Within said socket and having an outwardly turned flange, and a packing ring surrounding said seat member Within said casing and ada ted to be compressed by a movement of t e end of said seat member into said socket.

4. ln a valve :tor tires or the like, in oombination a casing, a seat member Within said casing having a shoulder, said shoulder, an anti-friction ring next said packing, and means also Within said. casing movable independently oi said seat member tor pressing said anti-friction ring and shoulder toward each other Without imparting substantial rotary movement to said ring or seat.

5. ln a valve for tires or the like, in combination a seat member having a metal portion adapted to engage a shoulder of the casing, a packing ring surrounding' said seat member above said metal portion, and a metal portion above two metal portions toward each other to exert an axial pressure on said ring, and said ring being oi elastic material adapted to expand laterally to engage the side el the casing.

6. lin a bination a seat member A adapted to engage a shoulder l) Within the casing to limit the dovvnvvard movement oi the seat member,

a ring of packing material surrounding said a packing next said packing ring, thel being movable axiallyvalve ior tires or the like, in comsest member, andme'ans for exerting an signed our names inthe presence of two axial pressure upon said rlng after said subscribing witnesses.

seat memberhas engaged said shoulder D, A MAXIMILIAN CHARLES SCHWE'INERTI said ring being of rubber to expand freely HENRY P. KRAFT.

5 in a lateral direction under such axial pres-A Witnesses:

sure to engage the side of the casing. Y EUGENE V. MYERS,

Witness whereof, we have hereunto FRED WHITE. 

